Originally Posted by
SignWave
This sort of makes sense. Something is loose someplace... OR there is an internal anomaly in the controller. When the head changes direction, is there any sort of rattle or mechanical/electrical noise? If you cut very slowly. will you get the same zig zag line? or does it go away ?
The purpose of the test file is to determine in which plane that the error occurs. It can only be one of two things... mechaincal failure/error/misadjustment of some portion of the drive system, or an electrical error.. ie excessive acceleration of either one of both axis.. If you did not adjust any configurations in your software and this error simply just began to happen... then look for loose parts... as Fixtureman suggests...Also, Check all aspects of your Y axi... It looks like your head is hitting a "speed bump" and then carries on normally once the oscillation stops only to repeat the process at the next directional change..
also try greasing the linear bearings that your gantry and focus head are mounted to.. You may need to acquire a grease gun with a needle tip in order to do so.